mordants

Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

n. Plural form of mordant.

Etymologies

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Examples

These coloured bodies are called "colour lakes," and the metallic compounds used in connection with their production "mordants," hence often the dye-stuffs applied by this method are termed "mordant dyes".

By and by, however, it was found possible to render some of the dyes more permanent, probably in the first instance by the application of certain kinds of earth or mud, as we know to be practiced by the Maori dyers of to-day, and in this way, as it appears to me, the early dyers learnt the efficacy of what we now call "mordants," which I may briefly describe as fixing agents for coloring matters.

Printing on textiles with colored dyes to produce the ever-popular calico prints, for instance was even more challenging—requiring thickeners, mordants, and solvents in multiple steps—and often took the dyers weeks to complete.

They sold dung of all kinds to be spread on the fields; they sold urine to dyers for use as mordants, according to complicated recipes, such as the one that called for the piss of drunkards during a full Moon.

De la Follie theorized that mordants were unnecessary with indigo because the coloring material contained the necessary salts within it. 13 That this was true could be confirmed by the color changes observed in the preparation and in the dyeing process — the same green-blue shift that Bergman had explained — proved this.

Louis-Guillaume de la Follie used the visual examples indigo provided to explain the use of salt in the coloration process. reference Salts control color, he claimed, because color changes occur when different salts (i.e., mordants) are used or when they are added in differing combinations.